Screw operated jack



July 29, 1941.

Klik:v

L E. FEENEY 2,250,627 scREw OPERATED JACK Filed Deo. 12, 1940 s sheets-sheet 1 ,Snnentor Clttornegs July 2 9, 1941. l. E. Fl-:ENEY 2,250,627

SCREW OPERATED JACKv July 29, 1941. L E F'EENEY l 2,250,627

'I SCREW ''PERATED JACK Filed Deo. l2, 1940 -ashets-sheet 5 v :inventor y f l Gttomegs Patented July 29, 1941 UNITED STATES BAT-EM @met 2,250,627 sCsnvgrERArEs Lawrence E. Feeney, Detroit, Mich., assigne;` kto VGeneral lVIotc'rs Cor16rat'ion;"Detroit', Mich., 'a corporation of Delaware" Application December 12, 1340, erial Sfiihil 8 Claims. (Cl.

lyly invention relates to lifting jacks of the by the motor and which also moves with the guide member, and said guide member being supported from a suitable base by trunnions; so t 't tlie'ja'ck may be used in an upright vertical Vition 'or' 'in' inclined position relative to base `a`nd"to the floor or ground upon which jackwrests. My improved screwY operated lack is adapted for maneuvering heavy objects by pushing against them, as well as by liftdevicefrm the floor or from a level below that vupon which the jack rests; and, although able Vof general usage, my improved screw ated jack yis especially adapted for moving, ctig, and placing large and heavy metal vork'ig presses without disassembling them,

without removing building roof trusses to Lsecurehead room for suitable lifting mechaas `has heretofore been necessary ,when suchpresses have had to be taken down, moved and `rie-erected in a new position.

m"In the'drawings accompanying and forming a .p artof this application, and wherein the preferred f orm of my invention is illustrated:

" "Figure 1 is a View showing my invention in end elevation for the most part, but broken awayin part to show a section upon a vertically -e riding central plane.

2 is a View showing a section upon a vertically extending plane indicated by the' line 2 2, Figure 1, looking toward the left.

E gure'S is a view showing a section upon a transverse horizontal plane indicated by the line lFigure 1, looking down.

-igure is a fragmentary view showing the t lower end of an inner guide member of my impV 'ed screw operated jack in elevation, and

parts broken away.

@figure 5 is a view showing a head part of my device inside elevation, as seen from a position nt'of the plane of Figure 2.

Elgure 6 is a view showing a section of said head part upon a plane indicated by the line 6 6, 5, looking toward the left.

` .lffliig 139W i@ .the .drawings ,my improved screw .OHeratd jack yhas an inner hollow guide member"4 of Yfrecta'ngular form in vcross section, andfco'mprising oppositely disposed"side plates 45 5 "connected together at Vtheir vertically `extending edges byend channel 4members 6 9;

andthe numeral 'l designates a tubular lifting 'Screw housingv within land"extending longitudinally of th guide member (l, and which housing vis'somewhat Vlonger than the side plates 5 5. The uppenendpf thev housing tube l lextends into ahole in'a connecting plate `8, seeFgures 1 and 2, 'which'confne'cting plate lies between the nppei'fextremities of' the side plates 5 5 and eirtendsfto .the channel members 5 6; and im te' al' spacing webs A9 9 are disposed between Ithe end'lchannel members 6 6 and the housing l. The side platQS, the vend channel members, the 'lifting screw housing, the connecting plate and .thespacing websare welded together where the bects bodily, and by lifting the object VA 2 0 they contact with one another as indicated.

lower' ends ,o f the side plates 5 5 and of cylindrical member I U, see Figures 2 and 4 and tilljlich member encloses the lower end of the housing-J as shown, and bearings Il ll against ,which the lower ends of the vchannel members ,6 6 abut are held in place between the lower edges of the side plates 5 5 and the member AIl) as shown in Figures 2 and 4; these last mentioned parts .being likewise welded together so that the guide member made up of the parts thus far enumerated is asingleunitary structure. The guide member 4 is supported from a suitable base l2 by two oppositely disposed tubular trunnions I3-I3 which are Welded in pla'ce in circular openings `provided in the base and which trunnions enter into circular seats in the bearing members! I I l, as shown in Figure 2, so that the device as a whole may be arranged in a vertical or in an inclined position as indicated in Figure 1;

Enc-losing and slidable vertically upon the inner guide'member 4 is an outer shell I4 which is likewise rectangular in cross section, and which kris guided in' its up and down movements by the guilde member 4. This member I4 is made up of side plates I5 I5, and end plates.

lB-l, which are welded together along their meeting edges; and strengthening plates Il l'i are shown as welded to "the lower ends of the lowermost position.

Secured to the upper end of the shell 4 is a head I 8 of cylindrical forni and having oppositely disposed longitudinally extending straight seats I 9-I9 at its sides, see Figures 5 and 6, within which the upper ends of the side plates I-I5 lie; and circumferentially extending semi-circular seats -20 adjacent its ends within which vthe upper ends of the end plates IS-IG lie; the plates being welded to the head as indicated. The upper end of the guide member 4 extends upward into the head and to a level indicated by the line 2l, Figure 2, which .corresponds with the level of the upper side of the connecting plate 8; and above the connect- :ing plate 8 is a recess 22 which houses a rotat- .able gear 23 which is keyed to the upper end of ;a lifting screw 24 which is in threaded engagevment with a non-rotatable nut 25 secured in place within the upper end of the lifting screw housing tube 1; so that when the screw 24 is rotated the head I8 is moved upward and away 'from the plate 8 upon which it rests when the .head is in its lowermost position shown in Figure 2; movement of the outer shell I4 which `moves with the head being guided by the inner :stationary guide member 4. :and at a higher level than the screw driving fgear :chamber 22 is a second chamber 2S within which a thrust bearing 2l is located; and guide 'bushings 28, 29 and va Icap screw 30 are provided ;at the upper extremity of the lifting yscrew 24.

Within lthe head The base I2 is built up from plates welded together to form an integral structure and comprises a horizontal base plate 3|, and two pairs l loi" vertically disposed semi-circular end plates 132-32 and 33-33, connected together by semi- 'circular bands 344-34, and which form pedestals for supporting the trunnions I3-I3; the pedyestals being strengthened by ribs as may be `deemed necessary, and having aligned-holes for receiving the ends of stop bars 35, for holdving the jack in an upright position or, by shifting the bar 36, permitting it to assume an inclined position, as indicated in Figure 2. The numerals .3l-3l designate arms carried by the pedestals :and which support a bar 38, which carries cable ,clamps 39 for anchoring a wire cable made use lof in certain uses of the jack.

The gear 23 is driven to rotate the screw 24 :and elevate the head I8 and the outer shell member I4 depending therefrom by a pinion 40 vwhich meshes therewith, and which is carriedby :a vertical shaft 4I supported by a bearing 42 Awhich is secured to the right hand lside plate I5, see Figure 1, and which shaft has a gear 43 at its lower end; and the gear 43 is driven by a pinion 44 of a speed reducing device 45 of any suitable form and constructionv which is also supported by the side plate I5 above mentioned; and this speed reducing mechanism is in turn driven through gearing 46, 4l by an air or equivalent motor 48 also supported by the right hand side plate I5; so that the whole driving mechanism for the lifting screw 24 is supported from the outer shell member I4 and moves upward and downward therewith. Guards 49, 50, 5I and 52 also secured to the outer shell I4 serve to protect the driving mechanism above described for the lifting screw 24.

The head I8 is provided with trunnions 53-53, and the numerals 54-54 designate grooved guides carried by said trunnions and shown as rotatable thereupon and over which wire cables anchored by the cable clamps 39 extend when the jack is to be used to lift an object `which lies upon the floor, or is located upon a lower level than the base I2 of the jack; and at such times,l and particularly when the jack is used in an inclined position as illustrated by dotted lines in Figure l, the base I2 will be anchored to the floor or ground so that the jack will not slip.

Having thus described and explained my invention I claim and desire to secure by Letters' Patent: l 1. In a screw operated jack, a suitable base; an inner hollow guide member supported by said base and extending upwardly therefrom,"K aj lifting screw housing within said guide member andl extending longitudinally thereof;- a rlpri-rot'at-f` able nut secured in place within the upper-'end of' said housing; a screw withinl said'l lifting? screw housing and in threaded engagementl with said nut; means whereby the upper end of said housing is connected with the upper end of said guide member; a vertically movable outer shell slidable upon said inner guide member; a 'head secured to the upper end of said outer shell and movable therewith; a rotatable gear housed within a recess in said head and operatively connected with the upper end of said screw, and which gear acts to lift said head and outer shell as said screw is rotated; a pinion supported by said outer shell member and meshing with said gear to drive the same; and means carried by said outer shell member and movable therewith for driving said pinion.

2. In a screw operated jack, a suitable base; an inner hollow guide member supported by said base and extending upwardly therefrom; a lift'- ing screw housing within said guide member and extending longitudinally thereof; a connecting plate extending between the upper end of said guide member the upper end of said lifting'screw housing, and having a hole into which the upper end of said housing extends; a non-rotatable nut secured in place within the upper end of said housing; a screw within said housing and in threaded engagement with said nut; a vertically movable outer shell slidable upon said inner guide member; a head secured to the upper end of said outer shell and movable therewith; a rotatable gear housed within a recess in said head and operatively connected with the upper end of said screw, and which gear acts to lift said head and outer shell as said screw is rotated; a pinion supported by said outer shell member and meshing with said gear to drive the same; and means carried by said outer shell member and moving therewith for driving said pinion.

3. In a screw operated jack, a suitable base; an inner hollow guide member supported by said base and extending upwardly therefrom, and comprising four plate members secured together at their meeting edges; a lifting screwhousing within said guide member and extending longitudinally thereof; a non-rotatable nut secured `in place within the upper end of said housing; a screw within said lifting screw housing and in threaded engagement with said nut; means whereby the upper end of said housing Vis connected with the upper end of said guide member; a vertically movable head having oppositely disposed longitudinally extending straight side seats, and semi-circular end seats connecting the ends of said side seats; four plates the upper ends of which are secured in place in said seats, and the meeting edges of which are secured together to thereby form an outer shell which is movable vertically with said head upon said inner guide member; a rotatable gear housed within a recess in said head and operatively connected with the upper end of said screw, and which gear acts to lift said head and outer shell as said screw is rotated; a pinion supported by said outer shell member and meshing with said gear to drive the same; and means carried by said outer shell member and movable therewith for driving said pinion.

4. In a screw operated jack, a suitable base; an inner hollow guide member supported by said base and extending upwardly therefrom, and comprising four plate members secured together at their meeting edges; a non-rotatable nut with` in and connected with the upper end of said guide member; a lifting screw within said guide member and extending longitudinally thereof, and which screw is in threaded engagement with said nut; a vertically movable head having oppositely disposed longitudinally extending straight side seats, and semi-circular end seats connecting the ends of said side seats; four plates the upper ends of which are secured in place in said seats, and the meeting edges of which are secured t0- gether to thereby form an outer shell which is movable vertically with said head upon said inner guide member; a rotatable gear housed within a recess in said head and operatively connected with the upper end of said screw, and which gear acts to lift said head and outer shell as said screw is rotated; a pinion supported by said outer shell member and meshing with said gear to drive the same; and means carried by said outer shell member and movable therewith for driving said pinion.

5. In a screw operated jack, a suitable base; an inner hollow guide member supported by said base and extending upwardly therefrom, and comprising four plate members secured together at their meeting edges; a non-rotatable nut with' in and connected with the upper end of said guide member; a lifting screw within said guide member and extending longitudinally thereof, and which screw is in threaded engagement with said nut; a vertically movable head; four plates the upper ends of which are secured to said head and the meeting edges of which are secured together to thereby form an outer shell which is movable vertically with said head upon said inner guide member; a rotatable gear housed within a recess in said head and operatively connected with the upper end of said screw, and which gear acts to lift said head and outer shell as said screw is rotated; a pinion supported by said outer shell member and meshing with said gear to drive the same; and means carried by said outer shell member and movable therewith for driving said pinion.

6. In a screw operated jack, a suitable base; a cable clamp carried by said base; an inner hollow guide member supported by said base and extending upwardly therefrom; a non-rotatable nut within and connected with the upper end of said guide member; a lifting screw within said guide member and extending longitudinally thereof, and which screw is in threaded engagement with said nut; a vertically movable head; a grooved cable guide carried by and movable with said head; an outer shell secured to said head and depending therefrom, and which outer shell surrounds said inner guide member and is guided in its movements thereby; a rotatable gear housed within a recess in said head and operatively connected with the upper end of said screw, and which gear acts to lift said head and outer shell as said screw is rotated; a pinion supported by said outer shell member and meshing with said gear to drive the same; and means carried by said outer shell member and movable therewith for driving said pinion.

7. In a screw operated jack, a suitable base having two oppositely disposed trunnions; an inner hollow guide member extending upwardly from said base, and which guide. member is supported by said trunnions and is movable into various angular positions relative to said base;

stop bars carried by said base for positioning the jack in an upright or in an inclined position relative to said base; a non-rotatable nut within and connected with the upper end of said guide member; a lifting screw within said guide member and extending longitudinally thereof, and which screw is in threaded engagement with said nut; a vertically movable head; an outer shell secured to said head and depending therefrom, and which outer shell surrounds said inner guide member and is guided in its movements thereby; a rotatable gear housed within a recess in said head and operatively connected with the upper end of said screw, and which gear acts to lift said head and outer shell as said screw is rotated; a pinion supported by said outer shell member and meshing with said gear to drive the same; and

`means carried by said outer shell member and movable therewith for driving said pinion.

8. In a screw operated jack, a hollow guide member comprising two side plates, and two end channel members extending between theedges of said side plates; a lifting screw housing within and extending longitudinally of said guide member; a plate extending between the upper end of said lifting screw housing and the upper ends of said side plates. and channel members, and having a hole into which the upper end of said rhousing extends; a non-rotatable nut within the upper end of said housing; a semi-circular member at the lower end of said guide member and extending between the lower ends of said side plates, and which semi-circular member encloses the lower end of said lifting screw housing; and two oppositely disposed bearing members arranged between said semi-circular member, the lower ends of said side plates and the lower ends of said channel members; said several parts being welded together to thereby provide a unitary hollow guide member.

LAWRENCE E. FEENEY. 

